Reconstruction and Validation of the Depressive Experiences Questionnaire
The Depressive Experiences Questionnaire (DEQ) was constructed to assess two distinct characterological configurations associated with depression--the anaclitic (dependent) and introjective (self-critical). Although the DEQ is widely used as a measure of these two personality constructs, its validity in actually measuring them is questionable. In this study we subjected a correlation matrix comprised of DEQ responses from a large sample of normal adults (N = 404) to confirmatory factor analysis to assess formally whether the DEQ is congruent with the theoretical parameters outlined by the model. Results indicated that neither the two-factor (Dependency, Self-Criticism) nor the three-factor (Dependency, Self-Criticism, Efficacy) models represented good approximations of the data. Using a series of exploratory factor analyses, we identified 19 items (9 dependency, 10 self-critical) from the original DEQ that were an excellent fit to the data for the two-factor model from "normal" adult, depressed outpatient, and student samples. Parameter estimates of the relationship between the two factors indicated only a modest association. Test-retest reliabilities for both the Dependency and Self-Criticism scales indicated excellent temporal stability. There were diagnostically meaningful variations in the mean scores between the "normal" sample and patient sample.
Bagby
RM
Clarke Institute of Psychiatry, University of Toronto
Parker
JDA
Joffe
RT
Buis
T